SRF2025 - 22nd International Conference on RF Superconductivity

Development of 1.5 GHz harmonic superconducting cavity and cryomodule

THP77

25 Sept 2025, 14:30

3h

Ito International Research Center

Board: THP77

Poster Presentation MC4: SRF Technologies Thursday Poster Session

Speaker

Zheng Mi (Chinese Academy of Sciences)

Description

The Institute of High Energy Physics (IHEP) developed the 1.5 GHz high -order harmonic cavity system for the Hefei Advanced Light Facility (HALF) project. This paper primarily introduces the design and development of the 1.5 GHz high-order harmonic superconducting cavity and cryomodule. The structure of the harmonic cavity has been simplified, and an integral welding method for the cavity with helium vessel has been adopted to enhance operational reliability. This not only reduces the complexity of the cavity but also minimizes potential failure points, thereby significantly improving the stability and performance of the 1.5 GHz high-order harmonic cavity system during operation. The design and development strategies presented here provide valuable references for similar high-frequency superconducting cavity projects in the future.